Soldering-iron



H. REMANE.

SOLDERING IRON.

APPLICATION FILED APR. 24, 191B..

1,350, 181 Patented Aug. 17, 1920.

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SOLDEmNG mow.

UNITED STATES HERMANN' REMAN, OF BERLIN, GERMANY.

SOLDERING-IRON.

Specification of Letters Patent.

Patented Aug. 17, 1920.

Application led April 24, 1918. Serial No. 230,584.

To all whom t may concern:

Be it known that I, HERMANN REMAN, a citizen of the Empire of Germany,and resident of Berlin, Germany, have invented certain new and usefulImprovements in Soldering-Irons, of whichl the following is aspecification.

My invention has for its object the creation of a new and usefulimproved solderingiron, in which a very good heating especially of thepointed soldering end is realized and in which the soldering iuid isprevented from acting in an unfavorable and destructive manner upon thesoldering-iron. Furthermore my invention comprises an advantageousprocess whereby such an improved soldering-iron may be manufactured in asimple and cheap manner. Another object of my invention consists inapplying the new construction of a soldering-iron to the type of ironswhich are heated by a gaseous or liquid fuel. v

In the accompanying drawings Figure l is a longitudinal section takenthrough a soldering-iron v according to my invention. Figs. 2s 3 and 4show various modifications of the construction illustrated by Fig. l.Figs. 5, 6 and 7 represent the different steps of a process formanufacturing the new soldering-iron. Fig. 8 shows a soldering-ironheated by gaseous fuel constructed according to my invention. Figs. 9 to16 give modifi cations of the construction shown by Fig. 8.

According to Fig. 1 the new solderingiron comprises an outer mantle Z)of iron or of another metal which does not readily oxidize in the flameand an inner core ,a of copper or of another metal which is a goodconductor of heat. The mantle b of iron has for instance a cylindricalform pointed at the one end and may be made of cast-iron or ofwrought-iron. An intimate connection of the mantle b with the core a canbe obtained by soldering or welding on applying eventually -anintermediate layer of a substance facilitating such a connection so asto insure a transmission of heat as perfect as possible from the core tothe mantle. The copper of the core a is introduced in the mantleb bycasting and is then covered at its rear end by means of a closing piecec preferably of iron.

In order to prevent a too rapid wear of the pointed end of the mantlewhich receives the soldering fluid, the wall of the ironmantle can bemade, as shown in Fig. 2, thicker at this end d than at the cylindricalpart for instance by upsetting to a suitable degree the mantle when madeof `wroughtiron or by augmenting correspondingly the thickness of thewall in the case of cast-iron mantle.

If the inner space of the pointed end of the mantle is very narrow, thepossibility exists that the molten copper will not flow in completely sothat the conducting of heat from copper to iron is very bad even at thatpart of the mantle serving for soldering. In this event it isadvantageous, as shown for instance in Fig. 3, to lirst introduce intothe end of the iron-mantle an alloy e having a lower melting point thanthe copper but also being a good heat conductor and then to infuse thecopper core a. Before introducing the alloy and the copper the innersurface of the iron-mantle may be covered with a layer of boraX andcoated with a fusible alloy of brass after having removed all the oxidfrom the interior of the mantle. The alloy e comprising for instancecopper and silver or brass and silver may be introduced in the form oflittle pieces, which are melted by heating the end of the mantle to asuitable temperature and fill up the fine gap at the end of the mantle.

Fig. 4 shows another arrangement whereby the core is caused to perfectlyfill the end of the mantle. According to Fig. 4 the mantle b ofcast-iron is provided with a pointed end f of wrought-iron, which iswelded to the mantle This separate end piece f can b'e easily enlargedso as to permit a good and perfect infusing of the copper.

The mantleof the new soldering-iron can be fabricated by drawing aniron-plate into the desired form, whereby-a wall of uniform thicknessand a smooth inner surface are obtained. If the mantle is made of castiron, it is advantageous to remove the carbon from the iron at the endreceiving the soldering material, while the other part of the mantleremains unaltered. For this purpose the soldering end of the cast-ironmantle is placed in a tempering mass and the remaining part of themantle is surrounded with a material, for instance loam, whereby theoXid is retained from the iron. The tempering is effected onlysuperficially so that the decarbonization does not advance in the iron.

Another method whereby the mantle may be fabricated lconsists inpressing it from an iron sheet'in the manner illustrated by Figs. 5 to 7First the iron sheet is stamped in the form shown in Fior` 5 whichcorresponds to a mantle halve and spread out and consequently comprisestwo equal parts Z) -and b1 with lacings g and L. This ironsheet is thenbrought into the form shown for instance in Fig. 6 by bending upward thesides of the halves b and b1 land raising the middle part g, h,whereafter the two halves Z1 and b] are bent upward so as to produce themantle shown in Fig. 7 Finally the butt joints are welded together andthe copper of the core a is melted into the mantle thus formed.

Fig. 8 represents a by a gas flame and constructed according to myinvention. In this case the ironmantle I) which receives the copper corea has an elongated portion b2 forming the combustion chamber and closedby an end cover u. The portion b2 mayhave a cylindrical or conical form.rlfhe gas admitting tube a enters the combustion chamber b2 through thecover u and carries the handle o of the lsoldering-iron. rlhe end of thetube a is divided into two pipes p and p1 which are connected with twoflexible tubes not shown, admitting gas and air respectively.v

A w'all Z for instance of sheet-iron surrounds the mantle b, b2 at apredetermined distance, the sheet-iron being fixed upon noses m arrangedon the elongated mantle portion b2. The end cover u is provided withopenings In whereby air is admitted to the combustion chamber b2.Oriices q are located in thel side' wall of the chamber b2 so thatv theflame coming from the gas tubea not only touches and heats the back ofthe copper core a but also may pass inv part through the orifices g intocontact with the outer side of the mantle b, these escaping flame jetsbeing directed bythe surrounding wall Z toward the pointed end of theiron mantle. Consequcntly this end is heated on the one hand indirectlyby the copper core working as a heat-conductor and on the other handdirectly by the flame jets leaving the combustion chamber.

The embodiment of my invention shown in Fig. 9 is distinguished from theconstrue` tion illustrated by Fig. 8 inI that the combustion chamber isconstituted by a separate piece i', in which the iron mantle bcontaining vthe copper core a is fixed by means 0f a screw s so as to beeasily removable for exchanging purposes. The chamber r carries anelongation r1 which surrounds the .iron mantle at a predetermineddistancefnnd corresponds to the wall Z of Fig. 8. The ori`- fires f]provided 'in the back of the mantle b permit the flame coming from thegas tube a to pass to the outer' side of the' mantle. ln

soldering-iron heated hollow piece 1'.

medial order to augment the heat conducting action of the copper core a,a layer t of a heat insulating material may be inserted between theiron-mantle Z1 and the copper core a at such a length that only at thepointed end of the mantle, which is the operative part during solderingis there an intimate and direct contact between iron and copper. The insulating layer can be obtained by purifying and covering with brass theinterior of the mantle only at the pointed end, while the other part ofthe interior is covered with a thin layer of clay or porcelain.

As shown in Fig. 10 the copper core filling the iron mantle can bemodified so as to form a part of the combustion chamber of asoldering-iron heated by gaseous fuel. ln this case the copper core a isprovided at its rear end with a bore-hole al which communicates with theelongated portion b2 of the mantle b forming the combustion chamber. Atthe bottom of the bore-hole al channels o are arranged through which thellame coming from the gas tube a and entering the bore-hole al canescape to the outer side of the mantle b, b2. The escaping llame-jetsare directed toward the rear end of the mantle by means of a cylindricalwall w for instance of sheet-iron surrounding the mantle at a certaindistance and connected therewith at its one end. The elongation b2 isclosed by a cover u provided with air` admitting openings lo If desiredthe inner copper core such as illustrated in a soldering-iron shown inFig. 9 may also be provided with a bore-hole at its rear end so as toform a part of the combustion chamber. Such an embodiment of myinvention is illustrated by the Figs. 11 to 14. According to Fig. 11 theiron mantle b contains a copper core a, which shows a bore-hole alcommunicating with the combustion chamber formed in the cylindrical Atthe bottom of the borehole al the channels 41 are arranged whereby 11the combustion chamber is placed in com` munication with the annularspace between the elongated wall r1 of the piece r and the mantle b. Thellame coming from the gas tube n enters the bore-hole al and penetrates115 through the channels o to the outer side of the mantle Z) asindicated by the arrows so as to heat the soldering-iron'on the insideas well as on the outside. The cylindrical piece r is provided at itsrear end with air 120 admitting openings c, as shown by Fig. 12, whichillustrates a transverse section through the solderingiron,on the line12,

12 of Fig. 11. Figs. 13 and 14 represent transverse sections of theapparatus on the 125 lines 13, 13 and 14, 14 of Fig. 11 respectively andshow especially the screws whereby the mantle 7) is fixed in thecylindrical piece 1 and the arrangement of the channels o in the mantleb and the core a. The mantle b 130 Xy fixed on the mantle b.

is displaceable in the cylindrical piece r and is guided by noses wprovided on the elongated wall r1.

The Figs. l5 and 16 illustrate a further arrangement whereby myinvention may be utilized in connection with a gas heatedsoldering-iron, F ig. l5 being a longitudinal section and Fig. 16 alateral view of the apparatus. According to Fig. 15 the mantle 7)including the core ay is surrounded at a distance by a wall y forinstance of sheetiron, which is fixed at its ends to the mantle 7) andprovided with openings e arrangedsee F ig. lG-toward the rear end ofthe. mantle Z). The core z has a bore-hole a? at the bottom of which thechannels 'v are situated. The soldering-iron a, Zi, Q/ thus obtained isplaced in the cylindrical piece r and fixed therein by means of thescrew s. The cylindrical piece 1' carries an elongated portion r1surrounding at a distance the wall The flame-jet coming from the gastube n enters the borehole al, escapes through the channels o, passesthrough the annular space formed be tween the mantle b and thesurrounding wall y penetrates through the openings e into the annularspace formed between the elongation r1 and the wall y and finallyreaches the front end of the mantle b. In this manner a very eflicaciousheating of the soldering-iron is eHected by causing the flame to take along double reversing or tortuous path, as indicated by the arrows so asto touch on the one hand the interior of the core a at a great lengthand on the other hand the outside of the 1mantle b as well as of thewall y.

Having now described and ascertained the nature of my said invention Ideclare what I claim and desire to secure by Letters Patent is:

l. A soldering iron comprising an outer recessed mantle composed of ametal not readily oxidizable in a flame and constituting the solderingsurface and an inner core located within the recess of said mantle andoperatively combirmd therewith, said inner core consisting of a metalwhich is a good conductor of heat.

2. A soldering iron comprising an outer hollow mantle having a pointedend and composed of a metal not readily oxidizable in a flame, saidmantle having a relatively thicker wall at said pointed end constitutingthe soldering surface, and an inner core located within said hollowmantle and consisting of a metal which is a good conductor of heat.

3. A soldering-iron, in which a core of a metal which is a good heatconductor is sur- A rounded by a mantle of a metal lwhich is not readilyoxidized under the action of .the flame, the pointed end of the mantlebeing filled with an alloy having a lower melting point than the rest ofthe core but being also a good heat conductor.

et. A soldering-iron, which is constituted by an inner core of copperand an outer mantle of cast-iron, the pointed end of said mantle beingof wrought-iron and welded to the cast-iron of the mantle.

5. A soldering-iron comprising in combination an inner core of a metalwhich is a good heat conductor, an outer mantle of iron forming thesoldering surface and surrounding said core, a combustion chamberconstituted by an elongated portion of said iron-mantle and a gasadmitting tube entering said chamber.

6. A soldering-iron comprising an inner core of a metal which is a goodheat conductor, an outer mantle of iron forming the soldering surfaceand surrounding said core, a combustion chamber constituted by anelongation of said mantle, a wall of sheetiron surrounding said mantleand said chamber at a certain distance, openings provided in saidelongation of said mantle opposite said surrounding wall, a gasadmitting tube entering said chamber and a handle fixed on said tube.

7. A soldering-iron comprising in combination an inner core of a metalwhich is a good heat-conductor, an outer mantle forming a solderingsurface and consisting of a metal not'readily oxidizable in the fiame, ahollow body forming a combustion chamber, means for fixing said mantlein said hollow bod a gas admitting pipe entering said hol ow body.

8. A soldering-iron comprising in combination an inner core of copper, asurrounding mantle of iron forming a soldering surface, a hollow bodyforming a combustion chamber and receiving the end of said mantle, meansfor fixing said mantle in said hollow body, a wall surrounding saidmantle at 'a certain distance and constituted by an elongation of saidhollow body, openings provided in the rear end of said mantle andcommunicating with the space between said mantle and said surroundingwall, and a gas admitting tube entering said combustion chamber.

9. A soldering-iron heated by gaseous fuel, which comprises incombination an outer mantle of iron constituting the soldering surface,an inner core of copper lling said mantle and provided at its rear endwith a bore-hole, a combustion chamber' formed by an elongation of saidmantle, a wall surrounding said mantle at a distance and fixed theretoat one end, channels provided in said core and said mantle so as toconnect said chamber and the space between said surrounding wall andsaid mantle, a gas inlet tube entering said combustion chamber and ahandle fixed to said gas tube.

l0. A soldering-iron heated by gaseous fuel, which comprises incombination an inner core of copper, an outer mantle of iron surroundingsaid core so as to constitute the soldering surface, a heat insulatinglayer iny serted between said mantle and said core to Y constituting thesoldering surface the pointed end of said mantle being decarbonizedsupcrficially.

12. ln a soldering-iron heated by gaseous fuel in combination an outermantle of iron constituting the soldering surface, an inner core ofcopper filling said mantle and provided with a bore-hole extending fromits rear end, a hollow cylindrical piece forming the combustion chamber,means Jfor fixing detachably said mantle in said cylindrical hollowpiece, channels provided in said core and sadmantle at the bottom ofsaid borehole, a wall surrounding said mantle at a distance andconstituted by an elongation of said hollow piece, a gas tube enteringsaid combustion chamber, air admitting openings medial provided intherear end of said hollow piece and a handle fixed to said gas tube.

13. A soldering-iron heated by gaseous fuel which comprises incombination an outer mantle of iron constituting the soldering surface,an inner core of copper provided with a bore-hole extending from itsrear end, channels arranged at the bottom of said bore-hole andpenetrating said core and said mantle, an outer wall surrounding saidmantle at a distance and fixed thereto at both its ends, openingsprovided in said surrounding wall at the rear end of said mantle, ahollow piece constituting the combustion chamber, means for fixing saidwall together with said mantle in said hollow piece, an elongatedportion combined with said hollow piece and surrounding at a distancesaid wall fixed toisaid mantle, a gas tube entering said combustionchamber, air admitting openings provided at the rear end of said hollowpiece and a handle fixed on said tube. p

ln testimony whereof, l have hereunto set my hand.

HERMANN REMANE.

